Results 61 to 70 of about 811,445 (252)

Time-Dependent Multilevel Density Functional Theory

open access: yesJournal of Chemical Theory and Computation
We present a novel three-layer approach based on multilevel density functional theory (MLDFT) and polarizable molecular mechanics to simulate the electronic excitations of chemical systems embedded in an external environment within the time-dependent DFT formalism.
Tommaso Giovannini   +2 more
openaire   +4 more sources

Time-Dependent Density-Functional Theory and Excitons in Bulk and Two-Dimensional Semiconductors

open access: yesComputation, 2017
In this work, we summarize the recent progress made in constructing time-dependent density-functional theory (TDDFT) exchange-correlation (XC) kernels capable to describe excitonic effects in semiconductors and apply these kernels in two important cases:
Volodymyr Turkowski   +2 more
doaj   +1 more source

Time-dependent density functional theory beyond the adiabatic local density approximation [PDF]

open access: yes, 1997
In the current density functional theory of linear and nonlinear time-dependent phenomena, the treatment of exchange and correlation beyond the level of the adiabatic local density approximation is shown to lead to the appearance of viscoelastic stresses
A. vom Felde   +24 more
core   +2 more sources

Time-dependent density functional theory for quantum transport [PDF]

open access: yesThe Journal of Chemical Physics, 2010
Based on our earlier works [X. Zheng et al., Phys. Rev. B 75, 195127 (2007); J. S. Jin et al., J. Chem. Phys. 128, 234703 (2008)], we propose a rigorous and numerically convenient approach to simulate time-dependent quantum transport from first-principles.
Mo, Y   +6 more
openaire   +6 more sources

Time-dependent current density functional theory via time-dependent deformation functional theory: A constrained search formulation in the time domain [PDF]

open access: yes, 2009
The logical structure and the basic theorems of time-dependent current density functional theory (TDCDFT) are analyzed and reconsidered from the point of view of recently proposed time-dependent deformation functional theory (TDDefFT).
Tokatly, I. V.
core   +3 more sources

Electron scattering in time-dependent density functional theory [PDF]

open access: yesThe European Physical Journal B, 2018
9 pages, 6 ...
Lionel Lacombe   +3 more
openaire   +3 more sources

Time-Dependent Density Functional Theory for Atomic Collisions: A Progress Report

open access: yesAtoms
In this paper, the current status of time-dependent density functional theory (TDDFT)-based calculations for ion–atom collision problems is reviewed.
Tom Kirchner
doaj   +1 more source

Automatic purpose-driven basis set truncation for time-dependent Hartree–Fock and density-functional theory

open access: yesNature Communications, 2023
Time-dependent calculations are widely employed in simulating spectra. Here, the authors present a basis set truncation scheme to analyse and accelerate TDDFT calculations with negligible change in the resulting electronic spectra.
Ruocheng Han   +2 more
doaj   +1 more source

Autoionization in time-dependent density-functional theory [PDF]

open access: yesPhysical Review A, 2016
We compute the exact exchange-correlation potential of the time-dependent density-functional theory (TDDFT) for the correlated process of autoionization. The potential develops barriers which regulate the autoionization rate. TDDFT employing known and practicable exchange-correlation potentials does not capture any autoionization dynamics. Approximate
openaire   +2 more sources

Study of high-order harmonic generation in xenon based on time-dependent density-functional theory

open access: yesNew Journal of Physics, 2021
The high-order harmonic generation (HHG) in xenon is studied by using the time-dependent density-functional theory. The dynamics of all electrons on the outer 4th and 5th atomic shells is considered with subsequent separation of contributions of ...
A A Romanov   +4 more
doaj   +1 more source

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